resolve code mode host from install context

scripts/install/install.sh

@@ -881,7 +881,9 @@ update_visible_command() {
 
   replace_path_with_symlink "$BIN_PATH" "$CURRENT_LINK/$codex_relative_path" "$tmp_link"
 
-  if [ "$os" = "darwin" ] && [ -x "$release_dir/$code_mode_host_relative_path" ]; then
+  if [ "$os" = "darwin" ] &&
+    [ "$code_mode_host_relative_path" = "bin/codex-code-mode-host" ] &&
+    [ -x "$release_dir/$code_mode_host_relative_path" ]; then
     replace_path_with_symlink \
       "$CODE_MODE_HOST_BIN_PATH" \
       "$CURRENT_LINK/$code_mode_host_relative_path" \
@@ -899,7 +901,9 @@ update_visible_command() {
 
 verify_visible_command() {
   "$BIN_PATH" --version >/dev/null
-  if [ "$os" = "darwin" ] && [ "$install_layout" = "package" ]; then
+  if [ "$os" = "darwin" ] && [ "$install_layout" = "package" ] &&
+    [ "$(package_code_mode_host_relative_path "$release_dir")" = \
+      "bin/codex-code-mode-host" ]; then
     [ -x "$CODE_MODE_HOST_BIN_PATH" ]
   fi
 }

scripts/install/test_install_sh.py

@@ -88,7 +88,9 @@ class InstallShTest(unittest.TestCase):
         self.assertIn("/codex-npm-", requests[1])
         self.assertNotIn("codex-package_SHA256SUMS", requests[1])
 
-    def test_macos_install_exposes_code_mode_host_beside_codex(self) -> None:
+    def test_macos_install_only_exposes_legacy_code_mode_host_beside_codex(
+        self,
+    ) -> None:
         for host_dir in ("codex-resources", "bin"):
             with (
                 self.subTest(host_dir=host_dir),
@@ -116,11 +118,14 @@ class InstallShTest(unittest.TestCase):
                 self.assertEqual(
                     os.readlink(codex_path), str(current / "bin" / "codex")
                 )
-                self.assertEqual(
-                    os.readlink(host_path),
-                    str(current / host_dir / "codex-code-mode-host"),
-                )
-                self.assertTrue(os.access(host_path, os.X_OK))
+                if host_dir == "bin":
+                    self.assertEqual(
+                        os.readlink(host_path),
+                        str(current / host_dir / "codex-code-mode-host"),
+                    )
+                    self.assertTrue(os.access(host_path, os.X_OK))
+                else:
+                    self.assertFalse(host_path.exists())
 
 
 def run_installer(